Modifies the definition of sanctuary policy

HB 3240 redefines "sanctuary policy" to include municipal actions that hinder federal immigration enforcement, such as restricting officials from sharing information about individuals without legal immigration status or blocking federal enforcement efforts. The bill prohibits municipalities from adopting such policies, making them ineligible for state grants until the policy is repealed. It also requires municipalities to provide written notice to law enforcement officers about their duty to cooperate with federal immigration enforcement. This law, effective January 1, 2009, directly affects all cities, towns, and counties in Missouri.